*The stock generator cover cannot be installed on a 3-point crankshaft. *The 3-point crankshaft requires the right journal bearing to be press-fitted into the crankcase.Special tool crankshaft installer & puller sets are available at SP Takegawa.Part Number: 00-01-0352 *When the 124cc / 125cc / 138cc engine is installed, the length of the engine becomes longer and the engine interferes with the tire with the stock front fork, stock top bridge and stem, so the front end needs to be changed.
*For Monkey and Gorilla It is recommended to install SP Takegawa's front fork kit at the same time.
*For CRF50F / XR50R and CRF70F / XR70R SP Takegawa does not sell front fork kits.There are some aftermarket frame and front fork kits on the market, but SP Takegawa has not confirmed the installation of these kits.You are responsible for your own vehicle installation. *SP Takegawa's digcrosser exhaust cannot be installed at the same time.
■Features of Super Head 4V+R (1 Cam 4 Valve) Compared to the SP Takegawa Super Head +R's large diameter 2 valves, the SP Takegawa Super Head +R has 2 intake valves and 2 exhaust valves, which increases the valve curtain area and improves the intake and exhaust efficiency more than the large diameter 2 valves.In addition, the head shape was designed to balance the center plug, valve pinching angle, combustion chamber shape, and port shape in order to achieve high power output and sustained output characteristics in the high RPM range, which is the biggest feature of the Super Head. By adopting 1 cam and 4 valves, it was possible to make it as light and compact as possible, and at the same time, it condensed the performance as the strongest SOHC head. New shape super head 4 valve + R body The round shape of the cylinder head suits the Monkey style and enhances the custom image of the vehicle. Each head cover is made of die-cast and barrel polished to give a beautiful appearance to the cylinder head. Valve Features Valve Spring The use of unequal pitch prevents surging at high RPM. IN / EX Port Features The port diameter is optimized for SP Takegawa's 3D shaped manifold.In addition, by installing it together with the 3-dimensionally shaped manifold, it enables a smooth intake effect from the carburetor to the combustion chamber without resistance, and the performance of the cylinder head can be maximized. Adoption of roller rocker arm By adopting the roller rocker arm, the output performance of the Super Head +R is maximized and the output in the mid to high speed range is increased and the output in the high rpm range is maintained, which is the characteristic of the roller rocker arm.The roller rocker arm reduces the frictional resistance with the camshaft that occurs with the slipper type rocker arm (stock part type), and the roller bearing in the rocker arm follows the cam profile smoothly from low to high RPM. M8 Spark Plug The M8 spark plug was adopted in conjunction with the optimum valve pinching angle and the compactness of the head due to the 4-valve system. ■Hollow camshaft (auto decompression mechanism) The camshaft is supported by ball bearings at both ends to reduce frictional resistance in the camshaft journal.Optional camshafts are available in addition to the included camshafts, allowing you to change the camshafts to suit your application and enjoy the performance of your vehicle. auto decompression mechanism It reduces the kick-start force and the load on the transmission when starting the engine, and allows smooth engine starting even with large displacement engines. ■Ceramic plated cylinder / piston The 125cc SCUT structure is patented. Adopts all-aluminum ceramic plated cylinder with excellent durability, airtightness and heat dissipation.The cylinder is equipped with a temperature sensor as standard.You can measure the cylinder temperature by purchasing SP Takegawa's thermometer built-in meter or thermometer. For SCUT 125cc: M5 Temperature Sensor The scut cylinder is equipped with an oil jet mechanism (patent pending) The oil jet cylinder is a cylinder that can inject oil into the cylinder and piston only by replacing the cylinder, without replacing the crankcase, disassembling the crankcase, processing the oil jet hole, or adding parts for oil jetting. By installing oil injection holes directly on the inner surface of the cylinder, oil can be injected into the piston skirt and the inner wall of the piston without interruption while the engine is running, and efficient lubrication and cooling can be achieved. 125cc models use cast pistons.The piston skirt is coated with molybdenum for better initial adhesion. ■Three-point crankshaft The crankshaft body has been balance cut for low vibration and light weight.The 3B crankshaft is further supported at three points to reduce crankshaft runout and increase durability. Comparison with 2B crank The conventional crankshaft is supported at two points by two bearing journals in the crankcase. The three-point crankshaft is supported at three points by connecting it to the bearings in the aluminum generator cover included in the kit, in addition to the two points in the crankcase. The crankshaft is now supported at three points.The crank taper part has a special surface treatment, and the flywheel mounting screw has been increased from M10 to M12 to increase the tightening force, which drastically reduces galling on the flywheel contact surface. Crankcase bearing for exclusive use with 3-point crankshaft In order to increase the durability of the crankcase and to prevent the output reduction, the bearing on the right crankcase side is a press-fitted type to reduce the thrust direction of the crank journal.
Points of Attention
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